Employee Benefit Plans (Components Of Net Pension Expense) (Details) $ in Millions			3 Months Ended		6 Months Ended
	May 01, 2018	Mar. 01, 2018	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Voluntary Early Retirement Program Minimum Age Requirement		55 years
Voluntary Early Retirement Program, Minimum Period		10 years
Voluntary Early Retirement Program Number of Eligible Associates		3,500
Voluntary Early Retirement Program, Percent of Eligible Associates from Total		6.00%
Associates Opting to Participate in VERP	2,200
VERP, Period of Health Care Coverage Following Retirement						24 months
VERP, charge recorded under SG&A			$ 12.1			$ 21.4
Service cost – benefits earned during the period			14.9	$ 18.6		29.9	$ 37.3
Interest cost on projected benefits			19.7	16.3		39.3	32.6
Expected return on plan assets			(33.0)	(34.3)		(65.9)	(68.6)
Net amortization and deferral			0.0	2.1		0.1	4.2
Defined Benefit Plan, Benefit Obligation, Payment for Settlement			12.8	0.0		28.1	0.0
Net pension expense			14.4	$ 2.7		31.5	$ 5.5
Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
VERP, Anticipated Future Charge					$ 8.0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment					$ 2.0
Non-cash Settlement Charges
Defined Benefit Plan Disclosure [Line Items]
VERP Expenses			$ 12.8			$ 28.1