Share-based Compensation (Stock Award Activity, Options, SARs & PSARs) (Schedules) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Options | Class A
Number of awards
Options outstanding at beginning of period (in shares) | shares	623,572
Options granted (in shares) | shares	48,286
Options expired, cancelled or forfeited (in shares) | shares	(29,466)
Options exercised (in shares) | shares	(46,459)
Options impact of dispositions (in shares) | shares	(15,415)
Options outstanding at end of period (in shares) | shares	580,518
Options exercisable and end of period (in shares) | shares	467,288
Weighted average exercise or base price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 29.41
Options granted (in dollars per shares) | $ / shares	27.82
Options expired, cancelled or forfeited (in dollars per shares) | $ / shares	30.95
Options exercised (in dollars per share) | $ / shares	18.52
Options impact of dispositions ( in dollar per shares) | $ / shares	17.69
Options outstanding at end of period (in dollars per shares) | $ / shares	30.38
Options exercisable at end of period (in dollars per share) | $ / shares	$ 31.66
Weighted average remaining contractual term
Options outstanding at end of period	4 years 2 months 12 days
Options exercisable at end of period	3 years 1 month 6 days
Aggregate intrinsic value
Options outstanding at end of period | $	$ 0.6
Options exercisable at end of period | $	$ 0.3
Options | Class C
Number of awards
Options outstanding at beginning of period (in shares) | shares	3,463,971
Options granted (in shares) | shares	330,019
Options expired, cancelled or forfeited (in shares) | shares	(384,214)
Options exercised (in shares) | shares	(343,147)
Options impact of dispositions (in shares) | shares	(821,877)
Options outstanding at end of period (in shares) | shares	2,244,752
Options exercisable and end of period (in shares) | shares	1,419,880
Weighted average exercise or base price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 24.87
Options granted (in dollars per shares) | $ / shares	26.31
Options expired, cancelled or forfeited (in dollars per shares) | $ / shares	26.21
Options exercised (in dollars per share) | $ / shares	21.14
Options impact of dispositions ( in dollar per shares) | $ / shares	23.93
Options outstanding at end of period (in dollars per shares) | $ / shares	25.76
Options exercisable at end of period (in dollars per share) | $ / shares	$ 27.97
Weighted average remaining contractual term
Options outstanding at end of period	5 years 7 months 6 days
Options exercisable at end of period	4 years
Aggregate intrinsic value
Options outstanding at end of period | $	$ 8.3
Options exercisable at end of period | $	$ 3.3
SARs | Class A
Number of awards
Options outstanding at beginning of period (in shares) | shares	19,245,884
Options granted (in shares) | shares	5,170,598
Options expired, cancelled or forfeited (in shares) | shares	(1,738,481)
Options exercised (in shares) | shares	(1,078,925)
Options impact of dispositions (in shares) | shares	(521,873)
Options outstanding at end of period (in shares) | shares	21,077,203
Options exercisable and end of period (in shares) | shares	11,916,219
Weighted average exercise or base price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 27.29
Options granted (in dollars per shares) | $ / shares	25.82
Options expired, cancelled or forfeited (in dollars per shares) | $ / shares	30.31
Options exercised (in dollars per share) | $ / shares	19.94
Options impact of dispositions ( in dollar per shares) | $ / shares	27.66
Options outstanding at end of period (in dollars per shares) | $ / shares	27.05
Options exercisable at end of period (in dollars per share) | $ / shares	$ 30.40
Weighted average remaining contractual term
Options outstanding at end of period	5 years 7 months 6 days
Options exercisable at end of period	3 years 4 months 24 days
Aggregate intrinsic value
Options outstanding at end of period | $	$ 62.4
Options exercisable at end of period | $	$ 15.7
SARs | Class C
Number of awards
Options outstanding at beginning of period (in shares) | shares	40,890,502
Options granted (in shares) | shares	15,719,407
Options expired, cancelled or forfeited (in shares) | shares	(3,433,326)
Options exercised (in shares) | shares	(2,520,420)
Options impact of dispositions (in shares) | shares	(1,050,350)
Options outstanding at end of period (in shares) | shares	49,605,813
Options exercisable and end of period (in shares) | shares	25,906,562
Weighted average exercise or base price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 26.27
Options granted (in dollars per shares) | $ / shares	25.70
Options expired, cancelled or forfeited (in dollars per shares) | $ / shares	29.30
Options exercised (in dollars per share) | $ / shares	20.11
Options impact of dispositions ( in dollar per shares) | $ / shares	26.79
Options outstanding at end of period (in dollars per shares) | $ / shares	26.18
Options exercisable at end of period (in dollars per share) | $ / shares	$ 29.08
Weighted average remaining contractual term
Options outstanding at end of period	5 years 10 months 24 days
Options exercisable at end of period	3 years 2 months 12 days
Aggregate intrinsic value
Options outstanding at end of period | $	$ 167.6
Options exercisable at end of period | $	$ 46.8
PSARs | Class A
Number of awards
Options outstanding at beginning of period (in shares) | shares	3,723,670
Options expired, cancelled or forfeited (in shares) | shares	(255,336)
Options exercised (in shares) | shares	(13,232)
Options impact of dispositions (in shares) | shares	(102,530)
Options outstanding at end of period (in shares) | shares	3,352,572
Options exercisable and end of period (in shares) | shares	14,297
Weighted average exercise or base price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 25.97
Options expired, cancelled or forfeited (in dollars per shares) | $ / shares	25.97
Options exercised (in dollars per share) | $ / shares	25.97
Options impact of dispositions ( in dollar per shares) | $ / shares	25.97
Options outstanding at end of period (in dollars per shares) | $ / shares	25.97
Options exercisable at end of period (in dollars per share) | $ / shares	$ 25.97
Weighted average remaining contractual term
Options outstanding at end of period	7 years 2 months 12 days
Options exercisable at end of period	7 years 2 months 12 days
Aggregate intrinsic value
Options outstanding at end of period | $	$ 5.9
Options exercisable at end of period | $	$ 0.0
PSARs | Class C
Number of awards
Options outstanding at beginning of period (in shares) | shares	7,447,340
Options expired, cancelled or forfeited (in shares) | shares	(510,668)
Options exercised (in shares) | shares	(26,464)
Options impact of dispositions (in shares) | shares	(205,059)
Options outstanding at end of period (in shares) | shares	6,705,149
Options exercisable and end of period (in shares) | shares	28,599
Weighted average exercise or base price
Options outstanding at beginning of period (in dollars per shares) | $ / shares	$ 25.22
Options expired, cancelled or forfeited (in dollars per shares) | $ / shares	25.22
Options exercised (in dollars per share) | $ / shares	25.22
Options impact of dispositions ( in dollar per shares) | $ / shares	25.22
Options outstanding at end of period (in dollars per shares) | $ / shares	25.22
Options exercisable at end of period (in dollars per share) | $ / shares	$ 25.22
Weighted average remaining contractual term
Options outstanding at end of period	7 years 2 months 12 days
Options exercisable at end of period	7 years 2 months 12 days
Aggregate intrinsic value
Options outstanding at end of period | $	$ 19.3
Options exercisable at end of period | $	$ 0.1
Options, SARs and PSARs | Class A | Former Employees
Number of awards
Options outstanding at end of period (in shares) | shares	1,690,876
Options exercisable and end of period (in shares) | shares	1,437,706
Weighted average exercise or base price
Options outstanding at end of period (in dollars per shares) | $ / shares	$ 31.26
Options exercisable at end of period (in dollars per share) | $ / shares	$ 32.73
Weighted average remaining contractual term
Options outstanding at end of period	3 years 3 months 18 days
Options exercisable at end of period	2 years 6 months
Aggregate intrinsic value
Options outstanding at end of period | $	$ 2.1
Options exercisable at end of period | $	$ 0.8
Options, SARs and PSARs | Class C | Former Employees
Number of awards
Options outstanding at end of period (in shares) | shares	4,479,177
Options exercisable and end of period (in shares) | shares	3,972,860
Weighted average exercise or base price
Options outstanding at end of period (in dollars per shares) | $ / shares	$ 28.86
Options exercisable at end of period (in dollars per share) | $ / shares	$ 29.70
Weighted average remaining contractual term
Options outstanding at end of period	2 years 8 months 12 days
Options exercisable at end of period	2 years 1 month 6 days
Aggregate intrinsic value
Options outstanding at end of period | $	$ 9.1
Options exercisable at end of period | $	$ 6.1