Employee Benefit Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Dec. 01, 2018	Dec. 02, 2017	Dec. 01, 2018	Dec. 02, 2017
Retirement Benefits [Abstract]
Contribution made to defined benefit plan	$ 186.4	$ 13.4	$ 196.9	$ 19.8
Discretionary contributions to minimize pension benefit guaranty corporation premium			150.0
Expected future employer contributions for remainder of the fiscal year	2.5		2.5
Defined contribution plan costs	$ 11.7	$ 9.4	$ 32.2	$ 32.6

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of contributions expected to be received by defined benefit plan from employer in fiscal year. Excludes contributions paid by employer in current fiscal year.

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Amount of cost for defined contribution plan.

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Amount of discretionary contributions made by an employer to a defined contribution plan.

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