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Pension and Other Postretirement Benefit Plans - Narrative (Details) - Pension Plans - U.S. $ in Millions	3 Months Ended
	Sep. 30, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Anticipated contribution to pension plan current year	$ 375
Contributions by employer	$ 325

X

- Definition

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

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+ References

No definition available.

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