Derivative Instruments - Additional Information (Details) € in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) swap	Apr. 01, 2017 USD ($)	Mar. 31, 2018 EUR (€) swap	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)
Change in unrealized gain (loss) on anticipated sales hedging:
Realized (losses) or gains	$ (5)	$ 1
Foreign currency cash flow hedge derivative | €			€ 387		€ 389
To be amortized through Accumulated other comprehensive loss	$ 4
Number of interest rate swaps | swap	3		3
Losses on the forward interest rate swaps designated in a hedging relationship expected to be reclassified from accumulated other comprehensive loss into earnings during the next 12 months	$ 2
Interest expense (less than)	$ 1
Percentage of hedge effectiveness	100.00%		100.00%
Derivative instruments designated as hedges
Change in unrealized gain (loss) on anticipated sales hedging:
Maturity period	12 months
Derivative instruments designated as hedges | Forward interest rate swaps
Change in unrealized gain (loss) on anticipated sales hedging:
Derivative forward long-term interest rate swap				$ 800
Derivative instruments not designated as hedges
Change in unrealized gain (loss) on anticipated sales hedging:
Realized (losses) or gains	$ 13	(4)
Derivative instruments not designated as hedges | Foreign Exchange Forward
Change in unrealized gain (loss) on anticipated sales hedging:
Maturity period	1 month
Derivative instruments not designated as hedges | Forward interest rate swaps | Interest expense
Change in unrealized gain (loss) on anticipated sales hedging:
Realized (losses) or gains	$ 13	$ 1
Losses on the forward interest rate swaps designated in a hedging relationship expected to be reclassified from accumulated other comprehensive loss into earnings during the next 12 months	$ 2