Pensions Benefit Plans and Other Postretirement Benefits - Amortized From AOCI (Details) $ in Millions	12 Months Ended
Dec. 31, 2017 USD ($)
U.S. Pension Plans
Amortization:
Actuarial loss	$ 52
Non-U.S. Pension Plans
Amortization:
Actuarial loss	13
U.S Postretirement Benefit Plans
Amortization:
Actuarial loss	1
Prior service cost	(8)
Net amortization	$ (7)

Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).

No definition available.

Name:	us-gaap_DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration