CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income (loss)	$ 660	$ (1,268)	$ (265)
Adjustments to reconcile to net cash provided by operating activities:
Depreciation and amortization (including amortization netted against equity earnings in affiliates and revenues)	1,061	1,133	1,163
Charges (gains) related to other operating expenses and other income	44	24	(148)
Loss on debt extinguishment	70	1,068	274
Stock-based compensation expense	263	329	51
Other non-cash and non-operating items, net	35	48	70
(Decrease) increase in cash, excluding the effects of acquisitions and dispositions, resulting from changes in:
Accounts receivable, current and long-term	(81)	(184)	(50)
Other assets, current and long-term	61	(199)	(48)
Accounts payable and other liabilities, current and long-term	35	(162)	1
Income tax accounts	(37)	6	(13)
Net cash (used in) provided by operating activities	2,111	795	1,035
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to property and equipment	(232)	(282)	(308)
Payments to secure customer service contracts, including outlays for conversion, and capitalized systems development costs	(245)	(320)	(259)
Acquisitions, net of cash acquired	(6)	(89)	(31)
Proceeds from dispositions	38	4	270
Proceeds from sale of property and equipment	38	17	3
Other investing activities, net	20	(15)	(4)
Net cash provided by (used in) investing activities	(387)	(685)	(329)
CASH FLOWS FROM FINANCING ACTIVITIES
Short-term borrowings, net	205	(31)	12
Proceeds from issuance of long-term debt	3,533	10,258	1,830
Payment of call premiums and debt issuance cost	(53)	(1,062)	(355)
Principal payments on long-term debt	(5,073)	(11,568)	(3,751)
Payment of taxes related to net settlement of equity awards	(61)	0	0
Proceeds from issuance of common stock	23	2,718	0
Distributions and dividends paid to noncontrolling interests and redeemable noncontrolling interest	(316)	(312)	(266)
Capital transactions with former parent, net	0	(19)	1,788
Other financing activities, net	8	0	(1)
Net cash provided by (used in) financing activities	(1,734)	(16)	(743)
Effect of exchange rate changes on cash and cash equivalents	(34)	(23)	(30)
Change in cash and cash equivalents	(44)	71	(67)
Cash and cash equivalents at beginning of period	429	358	425
Cash and cash equivalents at end of period	385	429	358
SUPPLEMENTAL CASH FLOW INFORMATION:
Income tax payments, net of refunds received	118	95	96
Interest paid	1,032	1,815	1,729
Distributions received from equity method investments	304	289	278
NON-CASH TRANSACTIONS:
Capital leases and other financing arrangements, net of trade-ins	$ 215	$ 83	$ 128