(Dollars in Millions) | 2013 | 2012 | 2011 | |||||||
Beginning of year | $ | 3,054 | 2,699 | 2,307 | ||||||
Increases related to current year tax positions | 643 | 538 | 402 | |||||||
Increases related to prior period tax positions | 80 | 57 | 87 | |||||||
Decreases related to prior period tax positions | (574 | ) | (41 | ) | (77 | ) | ||||
Settlements | (418 | ) | (120 | ) | (16 | ) | ||||
Lapse of statute of limitations | (56 | ) | (79 | ) | (4 | ) | ||||
End of year | $ | 2,729 | 3,054 | 2,699 |