Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000808362 (http://www.sec.gov/CIK)

Debt Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Debt Disclosure [Abstract]
Schedule of Debt - Net of Unamortized Discount and Debt Issuance Cost	Total debt consisted of the following at December 31, net of unamortized discount and debt issuance cost:   2016   2015 6.0% Notes due June 2018 $ 199   $ 255 7.5% Senior Notes due November 2018 524   747 3.2% Senior Notes due August 2021 511   746 8.55% Debentures due June 2024 112   149 6.875% Notes due January 2029 301   394 5.125% Notes due September 2040 1,132   1,482 Other debt 239   268 Total debt 3,018   4,041 Less: short-term debt and current portion of long-term debt 132   151 Total long-term debt $ 2,886   $ 3,890
Schedule of Maturities of Long-term Debt	Maturities of debt for each of the five years in the period ending December 31, 2021, and in the aggregate thereafter, are listed in the table below:   2017   2018   2019   2020   2021   Thereafter Total debt $ 132   $ 753   $ 26   $ 12   $ 524   $ 1,571