Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Weighted Average Assumptions - Stock Option Awards

Weighted-Average Assumptions	Successor				Predecessor
	For the Year Ended December 31, 2018		For the Period September 1 through December 31, 2017		For the Period January 1 through August 31, 2017		For the Year Ended December 31, 2016
Dividend yield	2.1	%	2.2	%	2.0	%	2.6	%
Expected volatility	23.3	%	23.59	%	23.21	%	28.27	%
Risk-free interest rate	2.8	%	2.1	%	2.3	%	1.8	%
Expected life of stock options granted during period (years)	6.2		7.2		7.2		7.2

Stock Option Activity

Stock Options	For the Year Ended December 31, 2018
	Number of Shares (in thousands)		Weighted Average Exercise Price (per share)		Weighted Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding at January 1, 2018	15,889		$	48.43
Granted	3,251		71.85
Exercised	(1,920	)	44.49
Forfeited/Expired	(141	)	56.63
Outstanding at December 31, 2018	17,079		$	53.26	4.77	$	909,699
Exercisable at December 31, 2018	12,103		$	48.14	3.17	$	582,700

RSU and PSU Activity

	For the Year Ended December 31, 2018
	Number of Shares (in thousands)		Weighted Average Grant Date Fair Value (per share)
Nonvested at January 1, 2018	4,198		$	68.28
Granted	965		70.37
Vested	(1,904	)	67.49
Forfeited	(112	)	66.86
Nonvested at December 31, 2018	3,147		$	68.18