Condensed Consolidating Supplemental Guarantor Information - Balance Sheets (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Jan. 01, 2017
Cash and cash equivalents	$ 348	$ 537	$ 401
Accounts receivable, net	1,338	1,270
Inventories	822	780
Due from affiliates	0	0
Other current assets	283	243
Total current assets	2,791	2,830
Property, plant and equipment, net	338	341
Goodwill	2,746	2,741
Intangibles, net	556	578
Assets for Plan Benefits, Defined Benefit Plan	129	118
Deferred income taxes	474	460
Investments in subsidiaries	0	0
Due from affiliates	0	0
Other assets	607	586
Total assets	7,641	7,654
Short-term borrowings	34	52
Accounts payable	697	762
Payroll and benefits liabilities	190	219
Contract liabilities	538	458
Due to affiliates	0	0
Other current liabilities	385	398
Total current liabilities	1,844	1,889
Long-term debt	3,038	2,939
Pension and indemnity plan liabilities	810	798
Postretirement and postemployment benefits liabilities	133	133
Income tax accruals	131	148
Due to affiliates	0	0
Other liabilities	245	200
Total liabilities	6,201	6,107
Redeemable noncontrolling interest	16	15
Series A convertible preferred stock	822	810
Stockholders' Equity Attributable to Parent	599	719
Noncontrolling interests in subsidiaries	3	3
Total stockholders’ equity	602	722		$ 736
Total liabilities and stockholders’ equity	7,641	7,654
Eliminations
Cash and cash equivalents	0	0	0
Accounts receivable, net	0	0
Inventories	0	0
Due from affiliates	(2,759)	(2,730)
Other current assets	(37)	(36)
Total current assets	(2,796)	(2,766)
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangibles, net	0	0
Assets for Plan Benefits, Defined Benefit Plan	0	0
Deferred income taxes	(31)	(31)
Investments in subsidiaries	(6,040)	(5,950)
Due from affiliates	(71)	(71)
Other assets	0	0
Total assets	(8,938)	(8,818)
Short-term borrowings	0	0
Accounts payable	0	0
Payroll and benefits liabilities	0	0
Contract liabilities	0	0
Due to affiliates	(2,759)	(2,730)
Other current liabilities	(37)	(36)
Total current liabilities	(2,796)	(2,766)
Long-term debt	0	0
Pension and indemnity plan liabilities	0	0
Postretirement and postemployment benefits liabilities	0	0
Income tax accruals	0	0
Due to affiliates	(71)	(71)
Other liabilities	(31)	(31)
Total liabilities	(2,898)	(2,868)
Redeemable noncontrolling interest	0	0
Series A convertible preferred stock	0	0
Stockholders' Equity Attributable to Parent	(6,040)	(5,950)
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	(6,040)	(5,950)
Total liabilities and stockholders’ equity	(8,938)	(8,818)
Parent Issuer
Cash and cash equivalents	21	97	27
Accounts receivable, net	55	62
Inventories	327	311
Due from affiliates	627	646
Other current assets	106	78
Total current assets	1,136	1,194
Property, plant and equipment, net	206	207
Goodwill	2,228	2,228
Intangibles, net	485	503
Assets for Plan Benefits, Defined Benefit Plan	0	0
Deferred income taxes	337	334
Investments in subsidiaries	3,139	3,008
Due from affiliates	32	31
Other assets	479	472
Total assets	8,042	7,977
Short-term borrowings	34	52
Accounts payable	321	382
Payroll and benefits liabilities	91	124
Contract liabilities	261	216
Due to affiliates	1,982	1,884
Other current liabilities	192	204
Total current liabilities	2,881	2,862
Long-term debt	3,036	2,937
Pension and indemnity plan liabilities	518	515
Postretirement and postemployment benefits liabilities	19	20
Income tax accruals	21	20
Due to affiliates	0	0
Other liabilities	146	94
Total liabilities	6,621	6,448
Redeemable noncontrolling interest	0	0
Series A convertible preferred stock	822	810
Stockholders' Equity Attributable to Parent	599	719
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	599	719
Total liabilities and stockholders’ equity	8,042	7,977
Guarantor Subsidiary
Cash and cash equivalents	11	11	13
Accounts receivable, net	11	12
Inventories	5	7
Due from affiliates	1,903	1,801
Other current assets	41	39
Total current assets	1,971	1,870
Property, plant and equipment, net	0	0
Goodwill	0	0
Intangibles, net	0	0
Assets for Plan Benefits, Defined Benefit Plan	0	0
Deferred income taxes	0	0
Investments in subsidiaries	2,901	2,942
Due from affiliates	0	1
Other assets	65	63
Total assets	4,937	4,876
Short-term borrowings	0	0
Accounts payable	2	0
Payroll and benefits liabilities	0	0
Contract liabilities	7	6
Due to affiliates	123	130
Other current liabilities	5	5
Total current liabilities	137	141
Long-term debt	0	0
Pension and indemnity plan liabilities	0	0
Postretirement and postemployment benefits liabilities	3	3
Income tax accruals	6	5
Due to affiliates	38	39
Other liabilities	36	36
Total liabilities	220	224
Redeemable noncontrolling interest	0	0
Series A convertible preferred stock	0	0
Stockholders' Equity Attributable to Parent	4,717	4,652
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	4,717	4,652
Total liabilities and stockholders’ equity	4,937	4,876
Non-Guarantor Subsidiaries
Cash and cash equivalents	316	429	$ 361
Accounts receivable, net	1,272	1,196
Inventories	490	462
Due from affiliates	229	283
Other current assets	173	162
Total current assets	2,480	2,532
Property, plant and equipment, net	132	134
Goodwill	518	513
Intangibles, net	71	75
Assets for Plan Benefits, Defined Benefit Plan	129	118
Deferred income taxes	168	157
Investments in subsidiaries	0	0
Due from affiliates	39	39
Other assets	63	51
Total assets	3,600	3,619
Short-term borrowings	0	0
Accounts payable	374	380
Payroll and benefits liabilities	99	95
Contract liabilities	270	236
Due to affiliates	654	716
Other current liabilities	225	225
Total current liabilities	1,622	1,652
Long-term debt	2	2
Pension and indemnity plan liabilities	292	283
Postretirement and postemployment benefits liabilities	111	110
Income tax accruals	104	123
Due to affiliates	33	32
Other liabilities	94	101
Total liabilities	2,258	2,303
Redeemable noncontrolling interest	16	15
Series A convertible preferred stock	0	0
Stockholders' Equity Attributable to Parent	1,323	1,298
Noncontrolling interests in subsidiaries	3	3
Total stockholders’ equity	1,326	1,301
Total liabilities and stockholders’ equity	$ 3,600	$ 3,619