REVISION OF PRIOR PERIOD FINANCIAL STATEMENTS - Revision to financial statements (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
	Jan. 01, 2019	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accrued contract costs		$ 676		$ 498
Total current liabilities		5,058		4,457
Other noncurrent liabilities		449		522
Total liabilities		10,730		10,446
Common stock, par value $0.01 per share, and additional paid-in capital (1,000.0 shares authorized, 224.2 shares issued)		4,315		4,284
Accumulated other comprehensive income (loss)		(1,089)		(1,143)
Total stockholders' equity before non-controlling interests		2,618		2,765
Total equity		$ 2,711	$ 4,902	$ 2,767		$ 4,985
Common Stock, Par value (in dollars per share)		$ 0.01		$ 0.01
Common Stock, Shares authorized (in shares)		1,000.0		1,000.0
Common Stock, Shares issued (in shares)		224.5		224.2
Provision for income taxes		$ 40	91
Over-accrual of Accrued contract costs
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accrued contract costs				$ 498
Total current liabilities				4,457
Other noncurrent liabilities				522
Total liabilities				10,446
Common stock, par value $0.01 per share, and additional paid-in capital (1,000.0 shares authorized, 224.2 shares issued)				4,284
Accumulated other comprehensive income (loss)			(1,182)	(1,143)	$ (1,096)
Total stockholders' equity before non-controlling interests				2,765
Total equity			4,902	$ 2,767	4,985
Common Stock, Par value (in dollars per share)				$ 0.01
Common Stock, Shares authorized (in shares)				1,000.0
Common Stock, Shares issued (in shares)				224.2
Net parent investment			6,027		6,023
Over-accrual of Accrued contract costs | As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accrued contract costs				$ 585
Total current liabilities				4,544
Other noncurrent liabilities				501
Total liabilities				10,511
Common stock, par value $0.01 per share, and additional paid-in capital (1,000.0 shares authorized, 224.2 shares issued)				4,218
Accumulated other comprehensive income (loss)			(1,186)	(1,143)	(1,100)
Total stockholders' equity before non-controlling interests				2,700
Total equity			4,848	2,702	4,931
Net parent investment			5,976		5,972
Over-accrual of Accrued contract costs | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Accrued contract costs	$ (57)	$ (87)		(87)
Total current liabilities				(87)
Other noncurrent liabilities				22
Total liabilities				(65)
Common stock, par value $0.01 per share, and additional paid-in capital (1,000.0 shares authorized, 224.2 shares issued)				66
Accumulated other comprehensive income (loss)			4	(1)	4
Total stockholders' equity before non-controlling interests				65
Total equity	43		54	$ 65	54
Net parent investment			$ 51		$ 51
Provision for income taxes	$ (14)