Condensed Consolidating Supplemental Guarantor Information - Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Jan. 01, 2017
Cash and cash equivalents	$ 343	$ 537	$ 377
Accounts receivable, net	1,272	1,270
Inventories	842	780
Due from affiliates	0	0
Other current assets	282	243
Total current assets	2,739	2,830
Property, plant and equipment, net	326	341
Goodwill	2,590	2,741
Intangibles, net	517	578
Assets for Plan Benefits, Defined Benefit Plan	127	118
Deferred income taxes	472	460
Investments in subsidiaries	0	0
Due from affiliates	0	0
Other assets	593	586
Total assets	7,364	7,654
Short-term borrowings	160	52
Accounts payable	711	762
Payroll and benefits liabilities	229	219
Contract liabilities	469	458
Due to affiliates	0	0
Other current liabilities	310	398
Total current liabilities	1,879	1,889
Long-term debt	2,952	2,939
Pension and indemnity plan liabilities	796	798
Postretirement and postemployment benefits liabilities	132	133
Income tax accruals	127	148
Due to affiliates	0	0
Other liabilities	258	200
Total liabilities	6,144	6,107
Redeemable noncontrolling interest	12	15
Series A convertible preferred stock	834	810
Stockholders' Equity Attributable to Parent	371	719
Noncontrolling interests in subsidiaries	3	3
Total stockholders’ equity	374	722		$ 737
Total liabilities and stockholders’ equity	7,364	7,654
Eliminations
Cash and cash equivalents	0	0	0
Accounts receivable, net		0
Inventories		0
Due from affiliates	(3,027)	(2,730)
Other current assets	(39)	(36)
Total current assets	(3,066)	(2,766)
Property, plant and equipment, net		0
Goodwill		0
Intangibles, net		0
Assets for Plan Benefits, Defined Benefit Plan	0	0
Deferred income taxes	(25)	(31)
Investments in subsidiaries	(5,911)	(5,950)
Due from affiliates	(68)	(71)
Other assets	0	0
Total assets	(9,070)	(8,818)
Short-term borrowings	0	0
Accounts payable	0	0
Payroll and benefits liabilities	0	0
Contract liabilities	0	0
Due to affiliates	(3,027)	(2,730)
Other current liabilities	(39)	(36)
Total current liabilities	(3,066)	(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	(68)	(71)
Other liabilities	(25)	(31)
Total liabilities	(3,159)	(2,868)
Redeemable noncontrolling interest	0	0
Series A convertible preferred stock	0	0
Stockholders' Equity Attributable to Parent	(5,911)	(5,950)
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	(5,911)	(5,950)
Total liabilities and stockholders’ equity	(9,070)	(8,818)
Parent Issuer
Cash and cash equivalents	11	97	23
Accounts receivable, net	42	62
Inventories	311	311
Due from affiliates	645	646
Other current assets	121	78
Total current assets	1,130	1,194
Property, plant and equipment, net	220	207
Goodwill	2,082	2,228
Intangibles, net	451	503
Assets for Plan Benefits, Defined Benefit Plan	0	0
Deferred income taxes	341	334
Investments in subsidiaries	3,133	3,008
Due from affiliates	31	31
Other assets	476	472
Total assets	7,864	7,977
Short-term borrowings	60	52
Accounts payable	307	382
Payroll and benefits liabilities	127	124
Contract liabilities	236	216
Due to affiliates	2,099	1,884
Other current liabilities	154	204
Total current liabilities	2,983	2,862
Long-term debt	2,950	2,937
Pension and indemnity plan liabilities	523	515
Postretirement and postemployment benefits liabilities	19	20
Income tax accruals	21	20
Due to affiliates	0	0
Other liabilities	163	94
Total liabilities	6,659	6,448
Redeemable noncontrolling interest	0	0
Series A convertible preferred stock	834	810
Stockholders' Equity Attributable to Parent	371	719
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	371	719
Total liabilities and stockholders’ equity	7,864	7,977
Guarantor Subsidiary
Cash and cash equivalents	6	11	10
Accounts receivable, net	12	12
Inventories	5	7
Due from affiliates	2,072	1,801
Other current assets	44	39
Total current assets	2,139	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	2,778	2,942
Due from affiliates	1	1
Other assets	64	63
Total assets	4,982	4,876
Short-term borrowings	0	0
Accounts payable	3	0
Payroll and benefits liabilities	0	0
Contract liabilities	7	6
Due to affiliates	118	130
Other current liabilities	5	5
Total current liabilities	133	141
Long-term debt	0	0
Pension and indemnity plan liabilities	0	0
Postretirement and postemployment benefits liabilities	3	3
Income tax accruals	8	5
Due to affiliates	36	39
Other liabilities	30	36
Total liabilities	210	224
Redeemable noncontrolling interest	0	0
Series A convertible preferred stock	0	0
Stockholders' Equity Attributable to Parent	4,772	4,652
Noncontrolling interests in subsidiaries	0	0
Total stockholders’ equity	4,772	4,652
Total liabilities and stockholders’ equity	4,982	4,876
Non-Guarantor Subsidiaries
Cash and cash equivalents	326	429	$ 344
Accounts receivable, net	1,218	1,196
Inventories	526	462
Due from affiliates	310	283
Other current assets	156	162
Total current assets	2,536	2,532
Property, plant and equipment, net	106	134
Goodwill	508	513
Intangibles, net	66	75
Assets for Plan Benefits, Defined Benefit Plan	127	118
Deferred income taxes	156	157
Investments in subsidiaries	0	0
Due from affiliates	36	39
Other assets	53	51
Total assets	3,588	3,619
Short-term borrowings	100	0
Accounts payable	401	380
Payroll and benefits liabilities	102	95
Contract liabilities	226	236
Due to affiliates	810	716
Other current liabilities	190	225
Total current liabilities	1,829	1,652
Long-term debt	2	2
Pension and indemnity plan liabilities	273	283
Postretirement and postemployment benefits liabilities	110	110
Income tax accruals	98	123
Due to affiliates	32	32
Other liabilities	90	101
Total liabilities	2,434	2,303
Redeemable noncontrolling interest	12	15
Series A convertible preferred stock	0	0
Stockholders' Equity Attributable to Parent	1,139	1,298
Noncontrolling interests in subsidiaries	3	3
Total stockholders’ equity	1,142	1,301
Total liabilities and stockholders’ equity	$ 3,588	$ 3,619