Pensions Benefit Plans and Other Postretirement Benefits - Reconciliation of Pension Plan Assets Using Significant Unobservable Inputs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
U.S Pension Plans
Defined Benefit Plan Disclosure
Fair value at beginning of year	$ 1,909	$ 2,190
Net increase (decrease)	(255)	(281)
Fair value at end of year	1,654	1,909
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure
Fair value at beginning of year	1,012	1,094
Net increase (decrease)	(1)	(82)
Fair value at end of year	1,011	1,012
Other | Non-U.S. Pension Plans
Defined Benefit Plan Disclosure
Fair value at beginning of year	30
Fair value at end of year	43	30
Level 3 | Non-U.S. Pension Plans
Defined Benefit Plan Disclosure
Fair value at beginning of year	11	5
Net increase (decrease)	(1)	6
Fair value at end of year	10	11
Level 3 | Other | Non-U.S. Pension Plans
Defined Benefit Plan Disclosure
Fair value at beginning of year	6
Fair value at end of year	$ 6	$ 6