FINANCING ARRANGEMENTS - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2018	Nov. 27, 2018	Sep. 30, 2018	Jun. 01, 2018	Dec. 31, 2017	Dec. 18, 2017	Mar. 21, 2017	Mar. 27, 2015	Jan. 30, 2015	Dec. 02, 2013	Jul. 12, 2013	Dec. 31, 2012	Oct. 04, 2012	Mar. 08, 2011	Feb. 08, 2011	Sep. 28, 2010
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 24,632				$ 25,752
Total long-term debt and other	24,305				25,444
Less: Current portion of long-term debt and other	228				209
Non-current portion of long-term debt	24,077				25,235
Series F Tranche B Term Loan Facility Due April 2022
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	0				3,521
Total long-term debt and other	0				3,420
June 2025 Term Loan B Facility Due June 2025
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	4,394				0
Total long-term debt and other	$ 4,269				0
Stated interest rate	5.38%
November 2025 Term Loan B Facility Due November 2025
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 1,481				0
Total long-term debt and other	$ 1,456				0
Stated interest rate	5.13%
Senior Secured Notes 6.50% Due March 2022
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate	6.50%						6.50%
Senior Secured Notes 7.00% Due March 2024
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate	7.00%						7.00%
Senior Secured Notes 5.50% Notes Due November 2025
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate	5.50%
5.375% Senior Notes due March 2020
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate								5.375%
7.00% Senior Notes due in October 2020
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate																7.00%
6.375% Senior Notes due in October 2020
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate												6.375%	6.375%
7.50% Senior Notes due July 2021
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate											7.50%
6.75% Senior Notes due in August 2021
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate															6.75%
5.625 % Senior Notes due December 2021
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate										5.625%
7.25% Senior Notes due in July 2022
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate														7.25%
5.50% Senior Notes due March 2023
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate									5.50%
5.875% Senior Notes due May 2023
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate								5.875%
4.50% Senior Notes Due 2023
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate								4.50%
6.125% Senior Notes due April 2025
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate								6.125%
9.00% Senior Notes due December 2025
Long-term debt, net of unamortized debt discount [Line Items]
Stated interest rate						9.00%
Senior Secured Notes | Senior Secured Notes 6.50% Due March 2022
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 1,250				1,250
Total long-term debt and other	1,239				1,235
Senior Secured Notes | Senior Secured Notes 7.00% Due March 2024
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	2,000				2,000
Total long-term debt and other	1,979				1,975
Senior Secured Notes | Senior Secured Notes 5.50% Notes Due November 2025
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	1,750				1,750
Total long-term debt and other	1,730				1,729
Senior Unsecured Notes | 5.375% Senior Notes due March 2020
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	0				1,708
Total long-term debt and other	$ 0				1,699
Stated interest rate	5.375%			5.375%
Senior Unsecured Notes | 7.00% Senior Notes due in October 2020
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 0				71
Total long-term debt and other	$ 0				71
Stated interest rate	7.00%
Senior Unsecured Notes | 6.375% Senior Notes due in October 2020
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 0				661
Total long-term debt and other	$ 0				656
Stated interest rate	6.375%
Senior Unsecured Notes | 7.50% Senior Notes due July 2021
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 0				1,625
Total long-term debt and other	$ 0				1,615
Stated interest rate	7.50%	7.50%
Senior Unsecured Notes | 6.75% Senior Notes due in August 2021
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 0				650
Total long-term debt and other	$ 0				648
Stated interest rate	6.75%			6.75%
Senior Unsecured Notes | 5.625 % Senior Notes due December 2021
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 700				900
Total long-term debt and other	$ 697				896
Stated interest rate	5.625%
Senior Unsecured Notes | 7.25% Senior Notes due in July 2022
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 0				550
Total long-term debt and other	$ 0				545
Stated interest rate	7.25%			7.25%
Senior Unsecured Notes | 5.50% Senior Notes due March 2023
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 1,000				1,000
Total long-term debt and other	$ 995				993
Stated interest rate	5.50%
Senior Unsecured Notes | 5.875% Senior Notes due May 2023
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 3,250				3,250
Total long-term debt and other	$ 3,229				3,224
Stated interest rate	5.875%
Senior Unsecured Notes | 4.50% Senior Notes Due 2023
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 1,720				1,801
Total long-term debt and other	$ 1,709				1,787
Stated interest rate	4.50%
Senior Unsecured Notes | 6.125% Senior Notes due April 2025
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 3,250				3,250
Total long-term debt and other	$ 3,226				3,222
Stated interest rate	6.125%
Senior Unsecured Notes | 9.00% Senior Notes due December 2025
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 1,500				1,500
Total long-term debt and other	$ 1,469				1,464
Stated interest rate	9.00%
Senior Unsecured Notes | 9.25% Senior Notes Due April 2026
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 1,500				0
Total long-term debt and other	$ 1,482				0
Stated interest rate	9.25%
Senior Unsecured Notes | 8.50% Senior Notes Due January 2027
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 750				0
Total long-term debt and other	$ 738				0
Stated interest rate	8.50%		8.50%	8.50%
Senior Unsecured Notes | Other
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	$ 12				15
Total long-term debt and other	12				15
Revolving credit facility | Revolving Credit Facility Due April 2018
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	0				0
Total long-term debt and other	0				0
Revolving credit facility | Revolving Credit Facility Due April 2020
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	0				250
Total long-term debt and other	0				250
Revolving credit facility | Revolving Credit Facility Due June 2023
Long-term debt, net of unamortized debt discount [Line Items]
Principal Amount	75				0
Total long-term debt and other	$ 75				$ 0
Stated interest rate	5.38%