Rendering

Component: (Network and Table)
Network
2412406 - Disclosure - Retirement Benefits (Details 4)
(http://www.atimetals.com/role/RetirementBenefitsDetails4)
TableSchedule Of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001018963 (http://www.sec.gov/CIK)
Defined Benefit Plan Disclosure [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
2015-01-01 - 2015-12-31
2014-01-01 - 2014-12-31
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Pension Benefits [Member]Other Postretirement Benefits [Member]Pension Benefits [Member]Other Postretirement Benefits [Member]Pension Benefits [Member]Other Postretirement Benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
 
 
 
 
 
 
Benefit obligation at beginning of year
2,805,900,000  
400,800,000  
2,953,900,000  
466,100,000  
  
Service cost
20,600,000  
2,600,000  
22,800,000  
2,700,000  
29,400,000  
2,900,000  
Interest cost
125,400,000  
16,000,000  
121,000,000  
17,900,000  
133,600,000  
24,000,000  
Benefits paid
(255,400,000) 
(47,700,000) 
(207,400,000) 
(53,400,000) 
  
Subsidy paid
0  
800,000  
0  
700,000  
  
Participant contributions
200,000  
0  
300,000  
0  
  
Effect of currency rates
(17,300,000) 
0  
(4,800,000) 
0  
  
Net actuarial (gains) losses - discount rate change
57,800,000  
4,600,000  
(124,400,000) 
(14,100,000) 
  
Net actuarial (gains) losses - other
(3,900,000) 
(2,100,000) 
44,500,000  
(19,100,000) 
  
Plan curtailments
(6,700,000) 
0  
0  
0  
  
Plan amendments
0  
(22,500,000) 
0  
0  
  
Special termination benefits
1,100,000  
2,300,000  
0  
0  
  
Benefit obligation at end of year
2,727,700,000  
 
354,800,000  
 
2,805,900,000  
 
400,800,000  
 
2,953,900,000  
 
466,100,000