Employee Benefit Plans (Narrative) (Details) shares in Millions					12 Months Ended
	Jul. 01, 2019	Jun. 30, 2019 USD ($)	May 01, 2018	Mar. 01, 2018	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($) shares	Dec. 31, 2017 USD ($)	Jun. 30, 2017 USD ($) shares	Dec. 31, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock options - term for stock options granted, in years						10 years
Stock repurchased during period (in shares) | shares						8.5		13.5
Cash payments for Restricted Stock Units						$ 27,100,000		$ 24,500,000		$ 25,200,000
Aggregate intrinsic value of stock options outstanding and exercisable						188,800,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value						$ 83,800,000
Weighted average remaining life of stock options outstanding and exercisable						7 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term						6 years
Aggregate intrinsic value for options exercised						$ 60,000,000		70,900,000		85,400,000
Award requisite service period						3 years
VERP announcement date				Mar. 01, 2018
VERP Minimum Age Requirement				55 years
VERP Minimum Period				10 years
VERP Number of Eligible Associates				3,500
VERP Percent of Eligible Associates from Total				6.00%
VERP Election Expiration Date			May 01, 2018
Associates Opting to Participate in VERP			2,200
VERP Expenses						$ 319,600,000		0		0
VERP Period of Health Care Coverage Following Retirement						24 months
VERP Expenses in SG&A						$ 13,400,000.0
VERP Charge Under Stock Based Comp Exp						3,800,000
Defined Benefit Plan, Accumulated Benefit Obligation						2,121,100,000		1,852,500,000
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Gains (Losses), after Tax						(238,100,000)
Defined Benefit Plan, Accumulated Other Comprehensive Income Net Prior Service Cost (Credit), after Tax						19,000,000
Defined Benefit Plan, Plan Assets, Contributions by Employer						10,900,000		11,900,000
Expected future plan benefit payment - 2019						308,000,000
Expected future plan benefit payment - 2020						148,800,000
Expected future plan benefit payment - 2021						160,200,000
Expected future plan benefit payment - 2022						100,300,000
Expected future plan benefit payment - 2023						107,700,000
Expected future plan benefit payment - 2024 to 2028						669,400,000
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment						319,500,000		100,000		100,000
Fair Value of Plan Assets						2,178,100,000		2,138,400,000		$ 2,006,300,000
Additional estimated future contribution						$ 8,300,000
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Percent						50.00%
Highly Compensated Employee Contribution Percentage To Retirement And Saving Plan						12.00%
Defined Contribution Plan, Cost							$ 100,600,000		$ 87,900,000		$ 81,900,000
Stock Options Granted After July 2008 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted						4 years
Time Based Restricted Stock granted during Fiscal 2013 [Domain] [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted						2 years
Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Minimum percentage that will ultimately vest under performance-based restricted stock awards based on performance target						0.00%
Maximum percentage that will ultimately vest under performance-based restricted stock awards based on performance target						150.00%
Employee Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Purchase price of common stock as percentage of market value						95.00%
Non-Vested Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost						$ 13,300,000
Weighted-average remaining requisite vesting period						2 years 2 months
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost						$ 54,400,000
Weighted-average remaining requisite vesting period						1 year 6 months
Non-Vested Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost						$ 65,600,000
Weighted-average remaining requisite vesting period						1 year 1 month
Minimum [Member] | Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Performance Period						1 year
Maximum [Member] | Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted						26 months
Share Based Compensation Arrangement By Share Based Payment Award Performance Period						3 years
Fair Value, Inputs, Level 2 [Member] | Cash and Cash Equivalents [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Fair Value of Plan Assets						$ 13,200,000		$ 15,200,000
Subsequent Event [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
VERP Anticipated Future Charge					$ 35,000,000
Supplemental Officers Retirement Plan Freeze Date	Jul. 01, 2019
Date to Accrue Benefit for SORP		Jun. 30, 2019
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year		$ 1,800,000			1,800,000
Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year		$ 2,200,000			$ 2,200,000