EMPLOYEE BENEFITS - Changes in the Fair Value of Pension Plan Assets, Projected Benefit Obligation, Funded Status, and Accumulated Benefit Obligation (Details) - USD ($) $ in Millions		12 Months Ended
	Sep. 07, 2016	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets as of January 1		$ 182
Fair value of plan assets as of December 31		104	$ 182
Qualified Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets as of January 1		917	923
Actual return (loss) on plan assets		82	(41)
Employer contributions	$ 75	75	100
Benefits and administrative expenses paid		(59)	(65)
Fair value of plan assets as of December 31		1,015	917
Projected benefit obligation		1,024	977
Pension obligation		(9)	(60)
Accumulated benefit obligation		1,024	977
Non-Qualified Plan
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets as of January 1		0	0
Actual return (loss) on plan assets		0	0
Employer contributions		8	9
Benefits and administrative expenses paid		(8)	(9)
Fair value of plan assets as of December 31		0	0
Projected benefit obligation		105	103
Pension obligation		(105)	(103)
Accumulated benefit obligation		$ 105	$ 103