Borrowings - Schedule of Borrowings (Details) - USD ($) $ in Millions		3 Months Ended
	Jan. 23, 2017	Mar. 31, 2017	Dec. 31, 2016
Short-term borrowings:
Total short-term borrowings		$ 364	$ 242
Unamortized deferred financing costs		(1)	(2)
Current portion of long-term borrowings:
Other arrangements and capital lease obligations		137	116
Total current portion of long-term borrowings		137	116
Total short-term and current portion of long-term borrowings		501	358
Long-term borrowings:
Total Long-term borrowings		18,123	18,131
Unamortized discount and unamortized deferred financing costs		(150)	(154)
Other arrangements and capital lease obligations		304	215
Total Borrowings		18,624	18,489
Long-term borrowings		18,700	18,800
Senior secured term loan facility due June 2020 at LIBOR plus 2.0% or a base rate plus 1.0% | LIBOR
Long-term borrowings:
Basis spread on variable rate (as a percent)	2.00%
Senior secured term loan facility due June 2020 at LIBOR plus 2.0% or a base rate plus 1.0% | Base Rate
Long-term borrowings:
Basis spread on variable rate (as a percent)	1.00%
Secured debt | Senior secured term loan facility due March 2021 at LIBOR and euro LIBOR plus 3.0% or, solely with respect to U.S. dollar-denominated term loans, a base rate plus 2.0%
Long-term borrowings:
Total Long-term borrowings		$ 4,381	4,379
Secured debt | Senior secured term loan facility due March 2021 at LIBOR and euro LIBOR plus 3.0% or, solely with respect to U.S. dollar-denominated term loans, a base rate plus 2.0% | Euro LIBOR
Long-term borrowings:
Basis spread on variable rate (as a percent)		3.00%
Secured debt | Senior secured term loan facility due March 2021 at LIBOR and euro LIBOR plus 3.0% or, solely with respect to U.S. dollar-denominated term loans, a base rate plus 2.0% | Base Rate
Long-term borrowings:
Basis spread on variable rate (as a percent)		2.00%
Secured debt | Senior secured term loan facility due July 2022 at LIBOR plus 3.0% or a base rate plus 2.0%, or solely with respect to euro-denominated term loans, euro LIBOR plus 3.25%
Long-term borrowings:
Total Long-term borrowings		$ 3,594	3,583
Secured debt | Senior secured term loan facility due July 2022 at LIBOR plus 3.0% or a base rate plus 2.0%, or solely with respect to euro-denominated term loans, euro LIBOR plus 3.25% | LIBOR
Long-term borrowings:
Basis spread on variable rate (as a percent)		3.00%
Secured debt | Senior secured term loan facility due July 2022 at LIBOR plus 3.0% or a base rate plus 2.0%, or solely with respect to euro-denominated term loans, euro LIBOR plus 3.25% | Euro LIBOR
Long-term borrowings:
Basis spread on variable rate (as a percent)		3.25%
Secured debt | Senior secured term loan facility due July 2022 at LIBOR plus 3.0% or a base rate plus 2.0%, or solely with respect to euro-denominated term loans, euro LIBOR plus 3.25% | Base Rate
Long-term borrowings:
Basis spread on variable rate (as a percent)		2.00%
Secured debt | Senior secured term loan facility due June 2020 at LIBOR plus 2.0% or a base rate plus 1.0%
Long-term borrowings:
Total Long-term borrowings		$ 1,284	0
Secured debt | Senior secured term loan facility due June 2020 at LIBOR plus 2.0% or a base rate plus 1.0% | LIBOR
Long-term borrowings:
Basis spread on variable rate (as a percent)		2.00%
Secured debt | Senior secured term loan facility due June 2020 at LIBOR plus 2.0% or a base rate plus 1.0% | Base Rate
Long-term borrowings:
Basis spread on variable rate (as a percent)		1.00%
Secured debt | 6.75% Senior secured first lien notes due 2020
Long-term borrowings:
Total Long-term borrowings		$ 0	$ 1,398
Interest rate (as a percent)			6.75%
Secured debt | 5.375% Senior secured first lien notes due 2023
Long-term borrowings:
Total Long-term borrowings		$ 1,210	$ 1,210
Interest rate (as a percent)		5.375%
Secured debt | 5.0% Senior secured first lien notes due 2024
Long-term borrowings:
Total Long-term borrowings		$ 1,900	1,900
Interest rate (as a percent)		5.00%
Secured debt | 5.75% Senior secured second lien notes due 2024
Long-term borrowings:
Total Long-term borrowings		$ 2,200	2,200
Interest rate (as a percent)		5.75%
Unsecured debt | 7.0% Senior unsecured notes due 2023
Long-term borrowings:
Total Long-term borrowings		$ 3,400	3,400
Interest rate (as a percent)		7.00%
Foreign lines of credit and other arrangements
Short-term borrowings:
Total short-term borrowings		$ 126	84
Senior secured revolving credit facility at either (i) LIBOR for deposits in the applicable currency plus 350 basis points or (ii) prime rate plus 250 basis points
Short-term borrowings:
Senior secured revolving credit facility at either (i) LIBOR for deposits in the applicable currency plus 350 basis points or (ii) prime rate plus 250 basis points		$ 11	0
Senior secured revolving credit facility at either (i) LIBOR for deposits in the applicable currency plus 350 basis points or (ii) prime rate plus 250 basis points | LIBOR
Long-term borrowings:
Basis spread on variable rate (as a percent)		3.50%
Senior secured revolving credit facility at either (i) LIBOR for deposits in the applicable currency plus 350 basis points or (ii) prime rate plus 250 basis points | Prime Rate
Long-term borrowings:
Basis spread on variable rate (as a percent)		2.50%
Accounts receivable securitized loan at LIBOR plus 200 basis points or a base rate equal to the highest of (i) the applicable lender's prime rate, or (ii) the federal funds rate plus 0.50%
Short-term borrowings:
Total short-term borrowings		$ 228	$ 160
Accounts receivable securitized loan at LIBOR plus 200 basis points or a base rate equal to the highest of (i) the applicable lender's prime rate, or (ii) the federal funds rate plus 0.50% | LIBOR
Long-term borrowings:
Basis spread on variable rate (as a percent)		2.00%
Accounts receivable securitized loan at LIBOR plus 200 basis points or a base rate equal to the highest of (i) the applicable lender's prime rate, or (ii) the federal funds rate plus 0.50% | Federal Funds Rate
Long-term borrowings:
Basis spread on variable rate (as a percent)		0.50%